Roll version 0.3.0
Updated to work w/ new karma.
Completely redid all the things.

* Tests use latest karma conf thing.
* add/sub/mult/div in correct operation order
* floor, round, and ceil of variables supported
* stringify available for rolls
Bumping the version.
Adding built versions to repo.
Updated readme.
Merge branch 'master' of https://github.com/lordnull/dice.js